Enum Validator 

pub enum Validator {
    Required,
    MinLength(usize),
    MaxLength(usize),
    Pattern(Regex),
    Email,
    Number,
    Integer,
    Custom(Rc<dyn Fn(&str) -> Option<String>>),
}

A validator that can be applied to form fields.

Variants

Required

Field is required (non-empty).

MinLength(usize)

Field must have at least this many characters.

MaxLength(usize)

Field must have at most this many characters.

Pattern(Regex)

Field must match a regex pattern.

Email

Field must be a valid email address.

Number

Field must be a valid number.

Integer

Field must be a valid integer.

Custom(Rc<dyn Fn(&str) -> Option<String>>)

Custom validation with error message.

Implementations

impl Validator

pub fn custom<F>(f: F) -> Self

where F: Fn(&str) -> Option<String> + 'static,

Create a custom validator with a closure.

pub fn pattern(pattern: &str) -> Result<Self, Error>

Create a pattern validator from a regex string.

pub fn validate(&self, value: &str) -> Option<String>

Validate a value, returning an error message if invalid.

Trait Implementations

impl Clone for Validator

fn clone(&self) -> Validator

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.